A Quantum Many-Body Instability in the Thermodynamic Limit

Details A Quantum Many-Body Instability in the Thermodynamic Limit A Quantum Many-Body Instability in the Thermodynamic Limit

2004-03-15

arxiv.org/abs/quant-ph/0403111v6

Mod.Phys.Lett. B20 (2006) 1059-1066

Physics

Quantum Physics

11 pages, 1 figure. Final version accepted for publication in Modern Physics Letters B

Scientific paper

10.1142/S0217984906011578

Intrinsic decoherence in the thermodynamic limit is shown for a large class
of many-body quantum systems in the unitary evolution in NMR and cavity QED.
The effect largely depends on the inability of the system to recover the
phases. Gaussian decaying in time of the fidelity is proved for spin systems
and radiation-matter interaction.

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